import 'dart:typed_data';

class BZip2 {
  static final Uint8List emptyUint8List =
      UnmodifiableUint8ListView(Uint8List(0));
  static final Uint32List emptyUint32List =
      UnmodifiableUint32ListView(Uint32List(0));
  static final Int32List emptyInt32List =
      UnmodifiableInt32ListView(Int32List(0));

  static int initialCrc = 0xffffffff;

  static int updateCrc(int value, int crc) {
    return ((crc << 8) ^ _bz2Crc32Table[(crc >> 24) & 0xff ^ (value & 0xff)]) &
        0xffffffff;
  }

  static int finalizeCrc(int crc) {
    return crc ^ 0xffffffff;
  }

  static const List<int> bzhSignature = [0x42, 0x5a, 0x68];

  static const int hdr0 = 0x30;

  static const List<int> compressedMagic = [0x31, 0x41, 0x59, 0x26, 0x53, 0x59];

  static const List<int> eosMagic = [0x17, 0x72, 0x45, 0x38, 0x50, 0x90];

  static const List<int> _bz2Crc32Table = [
    0x00000000,
    0x04c11db7,
    0x09823b6e,
    0x0d4326d9,
    0x130476dc,
    0x17c56b6b,
    0x1a864db2,
    0x1e475005,
    0x2608edb8,
    0x22c9f00f,
    0x2f8ad6d6,
    0x2b4bcb61,
    0x350c9b64,
    0x31cd86d3,
    0x3c8ea00a,
    0x384fbdbd,
    0x4c11db70,
    0x48d0c6c7,
    0x4593e01e,
    0x4152fda9,
    0x5f15adac,
    0x5bd4b01b,
    0x569796c2,
    0x52568b75,
    0x6a1936c8,
    0x6ed82b7f,
    0x639b0da6,
    0x675a1011,
    0x791d4014,
    0x7ddc5da3,
    0x709f7b7a,
    0x745e66cd,
    0x9823b6e0,
    0x9ce2ab57,
    0x91a18d8e,
    0x95609039,
    0x8b27c03c,
    0x8fe6dd8b,
    0x82a5fb52,
    0x8664e6e5,
    0xbe2b5b58,
    0xbaea46ef,
    0xb7a96036,
    0xb3687d81,
    0xad2f2d84,
    0xa9ee3033,
    0xa4ad16ea,
    0xa06c0b5d,
    0xd4326d90,
    0xd0f37027,
    0xddb056fe,
    0xd9714b49,
    0xc7361b4c,
    0xc3f706fb,
    0xceb42022,
    0xca753d95,
    0xf23a8028,
    0xf6fb9d9f,
    0xfbb8bb46,
    0xff79a6f1,
    0xe13ef6f4,
    0xe5ffeb43,
    0xe8bccd9a,
    0xec7dd02d,
    0x34867077,
    0x30476dc0,
    0x3d044b19,
    0x39c556ae,
    0x278206ab,
    0x23431b1c,
    0x2e003dc5,
    0x2ac12072,
    0x128e9dcf,
    0x164f8078,
    0x1b0ca6a1,
    0x1fcdbb16,
    0x018aeb13,
    0x054bf6a4,
    0x0808d07d,
    0x0cc9cdca,
    0x7897ab07,
    0x7c56b6b0,
    0x71159069,
    0x75d48dde,
    0x6b93dddb,
    0x6f52c06c,
    0x6211e6b5,
    0x66d0fb02,
    0x5e9f46bf,
    0x5a5e5b08,
    0x571d7dd1,
    0x53dc6066,
    0x4d9b3063,
    0x495a2dd4,
    0x44190b0d,
    0x40d816ba,
    0xaca5c697,
    0xa864db20,
    0xa527fdf9,
    0xa1e6e04e,
    0xbfa1b04b,
    0xbb60adfc,
    0xb6238b25,
    0xb2e29692,
    0x8aad2b2f,
    0x8e6c3698,
    0x832f1041,
    0x87ee0df6,
    0x99a95df3,
    0x9d684044,
    0x902b669d,
    0x94ea7b2a,
    0xe0b41de7,
    0xe4750050,
    0xe9362689,
    0xedf73b3e,
    0xf3b06b3b,
    0xf771768c,
    0xfa325055,
    0xfef34de2,
    0xc6bcf05f,
    0xc27dede8,
    0xcf3ecb31,
    0xcbffd686,
    0xd5b88683,
    0xd1799b34,
    0xdc3abded,
    0xd8fba05a,
    0x690ce0ee,
    0x6dcdfd59,
    0x608edb80,
    0x644fc637,
    0x7a089632,
    0x7ec98b85,
    0x738aad5c,
    0x774bb0eb,
    0x4f040d56,
    0x4bc510e1,
    0x46863638,
    0x42472b8f,
    0x5c007b8a,
    0x58c1663d,
    0x558240e4,
    0x51435d53,
    0x251d3b9e,
    0x21dc2629,
    0x2c9f00f0,
    0x285e1d47,
    0x36194d42,
    0x32d850f5,
    0x3f9b762c,
    0x3b5a6b9b,
    0x0315d626,
    0x07d4cb91,
    0x0a97ed48,
    0x0e56f0ff,
    0x1011a0fa,
    0x14d0bd4d,
    0x19939b94,
    0x1d528623,
    0xf12f560e,
    0xf5ee4bb9,
    0xf8ad6d60,
    0xfc6c70d7,
    0xe22b20d2,
    0xe6ea3d65,
    0xeba91bbc,
    0xef68060b,
    0xd727bbb6,
    0xd3e6a601,
    0xdea580d8,
    0xda649d6f,
    0xc423cd6a,
    0xc0e2d0dd,
    0xcda1f604,
    0xc960ebb3,
    0xbd3e8d7e,
    0xb9ff90c9,
    0xb4bcb610,
    0xb07daba7,
    0xae3afba2,
    0xaafbe615,
    0xa7b8c0cc,
    0xa379dd7b,
    0x9b3660c6,
    0x9ff77d71,
    0x92b45ba8,
    0x9675461f,
    0x8832161a,
    0x8cf30bad,
    0x81b02d74,
    0x857130c3,
    0x5d8a9099,
    0x594b8d2e,
    0x5408abf7,
    0x50c9b640,
    0x4e8ee645,
    0x4a4ffbf2,
    0x470cdd2b,
    0x43cdc09c,
    0x7b827d21,
    0x7f436096,
    0x7200464f,
    0x76c15bf8,
    0x68860bfd,
    0x6c47164a,
    0x61043093,
    0x65c52d24,
    0x119b4be9,
    0x155a565e,
    0x18197087,
    0x1cd86d30,
    0x029f3d35,
    0x065e2082,
    0x0b1d065b,
    0x0fdc1bec,
    0x3793a651,
    0x3352bbe6,
    0x3e119d3f,
    0x3ad08088,
    0x2497d08d,
    0x2056cd3a,
    0x2d15ebe3,
    0x29d4f654,
    0xc5a92679,
    0xc1683bce,
    0xcc2b1d17,
    0xc8ea00a0,
    0xd6ad50a5,
    0xd26c4d12,
    0xdf2f6bcb,
    0xdbee767c,
    0xe3a1cbc1,
    0xe760d676,
    0xea23f0af,
    0xeee2ed18,
    0xf0a5bd1d,
    0xf464a0aa,
    0xf9278673,
    0xfde69bc4,
    0x89b8fd09,
    0x8d79e0be,
    0x803ac667,
    0x84fbdbd0,
    0x9abc8bd5,
    0x9e7d9662,
    0x933eb0bb,
    0x97ffad0c,
    0xafb010b1,
    0xab710d06,
    0xa6322bdf,
    0xa2f33668,
    0xbcb4666d,
    0xb8757bda,
    0xb5365d03,
    0xb1f740b4
  ];
}
